Request WordPress user to delete abandoned blog in order to free URL

I’ve come up with several names for a new blog I plan to start but all are taken, three by persons who have created a blog and not written a single thing on it. The blogs have only the automatic ‘this is a post’ and ‘this is a comment’ items on them and are effectively abandoned. I would like to use the URLs. Is there a way to redistribute a blog URL to another WordPress user? If so, is there a way to do this without requiring any effort on the part of the abandoner, who may well have stopped responding to the linked email account, let alone blog comments on an abandoned blog?

Thank you Jan for pointing out that I’m in the wrong forum.
To Andrew: I have had a reply from one user who is happy to delete their blank blog in order to free the URL. If they simply delete their blog, will it become available, or will it fall through the cracks and remain frozen? Apparently there are multiple options when deleting a blog.